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T4,G3 Glow Plug Relay

This replacement glow plug relay is designed to control the pre-heating system on a wide range of Volkswagen TDI engines, including VW Transporter T4 2.5 TDI models and other vehicles equipped with the specified engine codes.

Fitted in the main relay panel (location 4/103 depending on model), this relay manages the glow plugs’ operation, ensuring reliable cold starts and correct post-start heating cycles. Over time, the original relay can fail internally, leading to difficult starting, poor cold running, or glow plug fault codes.

Fitment Details:
VW Transporter T4: 2.5 TDI engines (ACV, AJT, AHY, AUF, AYY, AYC, AXG)
VW Transporter T5: 2003–2006, 1.9–2.5 TDI engines
VW Golf Mk3 & Mk3 Cabriolet: TDI models
VW Golf Mk4 / Bora: TDI models (relay location 4/103)
VW Vento: TDI models
VW Polo Mk3 6N: TDI models

Specifications:

  • Relay marking: Relay 4/103 (also referenced as 12/103 on T4)

  • Direct-fit replacement for the original relay

  • Suitable for 12V glow plug systems

Features:

  • OE-style performance and fitment

  • Restores proper glow plug control for reliable starting

  • High-quality internal components for long service life

Fitting Notes:

  • Position: Main relay panel (refer to your vehicle’s relay diagram for exact location)

  • Always check wiring and glow plugs when replacing the relay

  • Clear any fault codes after installation

Applications:

  • VW Transporter T4: 2.5 TDI (ACV, AJT, AHY, AUF, AYY, AYC, AXG)

  • VW Transporter T5: 2003–2006 (1.9–2.5 TDI)

  • VW Golf Mk3 & Mk3 Cabriolet: TDI

  • VW Golf Mk4 / Bora: TDI

  • VW Polo Mk3 6N: TDI

  • VW Vento: TDI

Quantity: Sold each
Quality: Good quality reproduction

Manufacturer: JP

Availability: Stock Item

Unit of Measure: Each

Dimensions:

Width: 35mm

Height: 35mm

Depth: 60mm

Volume: 73500mm3

Weight: 0.037kg

This Part Fits: T4 Transporter, T5 Transporter, Mk3 Golf, Mk4 Golf, Bora, Mk3 Polo, Vento,

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